Full color displays (white OLEDs) require all the primary colors: blue, green, and red. In recent decades, numerous phenanthroimidazole-based emitting materials have been developed for efficient blue OLEDs.

Organic light-emitting diodes (OLEDs) are the most successful invention of organic electronics in today’s market and have received persistent attention from industrial and scientific communities. OLEDs have rapidly developed into...

Efficient near ultraviolet light-emitting materials are of particular importance in organic light emitting devices (OLEDs) because of its impending application in high-quality flat panel displays and white OLEDs. In the...

Two new deep blue phenanthroimidazole base luminophores 2-(4-(4-(4-(1-phenyl-1H-phenanthro[9,10-d]imidazol-2-yl) phenoxy)butoxy)phenyl)-1-phenyl-1H-phenanthro[9,10-d]imid -azole (DPIPOBn) and 2-(4-(4-(4-(1-(4-tert-butylphenyl)-1Hphenanthro[9,10-d]imidazol-2-yl) phenoxy)butoxy)phenyl)-1-(4tert-butylphenyl)-1H-phenanthro[9,10-d]imidazole (DPITBOBn) were designed and synthesized by linkage two phenanthroimidazole functional units via the highly flexible alkyl (butane) spacer with different N1 functional groups (benzene and tertbutylbenzene). The synthesized luminophores were structurally characterized by spectroscopic method ( 1 H, 13 C, and mass). The photophysical, electrochemical and electroluminescence properties of the luminophores were systematically studied. These luminophores emit intense blue PL emission in both solution and solid phase. The HOMO-LUMO energy level of the luminophores was calculated from Cyclic Voltammetry (CV) analysis and which agreed with the results from the densityfunctional-theory (DFT) calculation. The time-dependent DFT (TD-DFT) calculation was performed to know the excited states (singlet and triplet) of the luminophores. The solutionprocessed OLED was fabricated to test these materials as emissive materials and as emitters. All the doped devices exhibited near-UV emission with EL peaks centered around 380-395 nm with Commission International deL'Eclairage (CIE) coordinate of (0.16, 0.09 or 0.10). Among all the doped devices, DPITBOBn (3 wt%) based device displayed a power efficiency (PE) of 0.5 lm/W, a current efficiency (CE) of 1.2 cd/A and external quantum efficiency (EQE) of 1.9% at the brightness 100 cd/m 2 .[a] J. Tagare, Prof. S. Vaidyanathan

In this work, two bipolar non-conjugated deep-blue emitters, PICFOCz and BICFOCz were synthesized by incorporating the charge transporting carbazole (donor/hole transporting) and an imidazole (acceptor/electron transporting) moieties via flexible alkyl...